Quasi-periodic pulsations or homologous flares? The ambiguous nature of the event observed by STIX

Żaneta Szaforz and Tomasz Mrozek

We investigated a solar flare that occurred on 22 May 2021. Four regular maxima were observed both on STIX/Solar Orbiter and XRS/GOES light curves, which suggest the occurrence of quasi-periodic pulsations (QPPs). The AIA/SDO images, however, revealed that the first X-ray burst is correlated with the EUV brightening that occurred in other magnetic structure than the remaining three. It is therefore unclear if this is QPPs event or a series of homologous flares.

Proceedings of the Polish Astronomical Society, vol. 12, 143-145 (2022)

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